[Purpose/significance] Exploring the emergence of core knowledge in the domain knowledge network can help to reveal the inherent mechanism of knowledge development, which is of great significance to master the context and mode of knowledge development.[Method/process] Based on the idea of the complex network, the domain knowledge networks were constructed based on the adjacency relation of keywords. By using the analysis method of the hub emergence, the domain knowledge networksweredynamically tracked and analyzed along the time series. This article analyzed the knowledge emergence of the domain knowledge networks from three aspects——the degree distribution of knowledge nodes, the entropy analysis, and the emergence of the specific node.[Result/conclusion] The results show:the randomness and non-randomness affect each other in the process of the emergence of core knowledge; the emergence of core knowledge shows the evolving trend from randomness dominant to structure dominant; the emerging core knowledge is not once and for all.
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